It's not a bad deal , I can see the benefits. Coachella camping does offer vip showers . For electricity consider something like this Portable Power Station 300W, LIPOWER 296Wh/80000mAh Solar Power Generator, with 300W/110V Pure Sine Wave AC Outlet, PD 45W Output, USB QC3.0, LED Light for Outdoor Camping CPAP Backup Battery Supply https://www.amazon.com/dp/B08TW7X247/ref=cm_sw_r_apan_glt_i_VS732PXGG0Y68D6GR0BJ?_encoding=UTF8&psc=1 .maybe with a rechargeable fan

Geek Aire Fan, Battery Operated Floor Fan, Rechargeable Powered High Velocity Portable Fan with Metal Blade, Built-in Durable Battery Run for Whole Day Time, for Camping Travel Hurricane, 12 Inch https://www.amazon.com/dp/B07P3ZG4B5/ref=cm_sw_r_apan_glt_i_BBJ8R8TPHVRW502T561Y

Not mountable but these fans are the best portable fans I’ve found. They are rechargeable and can run off the charging cord. Could probably find a way to mount it.

Geek Aire Fan, Battery Operated Floor Fan https://www.amazon.com/dp/B07P3ZG4B5/ref=cm_sw_r_cp_api_i_YFE33MP1C8QTWRQBZQKR